Diverticulosis is the formation of abnormal pouches in the bowel wall. Diverticulitis is inflammation or infection of these abnormal pouches. Together, these conditions are known as diverticular disease. Treatment options include a change of diet, antibiotics and (rarely) surgery.
Diverticulitis is more serious because infection can lead to other problems. Diverticulosis leads to diverticulitis in about 1 out of 5 to 1 out of 7 cases.
Uncomplicated diverticulitis
Your doctor is likely to recommend: Antibiotics to treat infection, although new guidelines state that in very mild cases, they may not be needed. A liquid diet for a few days while your bowel heals. Once your symptoms improve, you can gradually add solid food to your diet.
Actually, no specific foods are known to trigger diverticulitis attacks. And no special diet has been proved to prevent attacks. In the past, people with small pouches (diverticula) in the lining of the colon were told to avoid nuts, seeds and popcorn.
Lifestyle remains the major culprit behind diverticulitis flare-ups. A high-fat, low-fiber diet commonly followed in Western countries can exacerbate diverticulitis symptoms. Lack of fiber in the diet can cause constipation and strain the bowel.
Despite having some symptoms in common, diverticular disease isn't associated with more serious conditions, such as bowel cancer. However, diverticulitis is often a medical emergency, requiring immediate medical attention and, frequently, admission to hospital.
Fresh fruits, like apples, have the most fiber when eaten with the skin. 13 However, if you're having symptoms of diverticulitis, look for lower-fiber options, like applesauce. Bananas are another good source of fruit fiber.
There are no specific foods you need to avoid. You do not need to avoid any foods such as nuts, seeds, corn, popcorn or tomatoes if you have diverticular disease. These foods do not make diverticular disease worse. These foods may even help prevent it because they are high fibre choices.
Once you developed diverticula, they are unlikely to go away. Bleeding and inflammation are two common complications of diverticulosis. Diet plays an important role in the prevention of the progression of diverticulosis, but will not be able to reverse the process.
If you have diverticulosis
The main changes are adding fiber and drinking more water. Fiber absorbs water as it travels through your colon. This helps your stool stay soft and move smoothly. Water helps this process.
When diverticulosis is far advanced, the lower colon may become very fixed, distorted, and even narrowed. When this occurs, there may be thin or pellet-shaped stools, constipation, and an occasional rush of diarrhea. The problem then becomes a mechanical or structural one, and treatment is more difficult.
However, the risk of colorectal cancer is increased in the short-term period after hospitalization related to diverticular disease. According to a recent systematic review and meta-analysis, the prevalence of colorectal cancer is 1.6% in patients with acute diverticulitis who underwent colonoscopy.
The doctor also may suggest taking a fiber product, such as Citrucel® or Metamucil®, once a day. Your doctor may recommend a low- or high-fiber diet depending on your condition. Listed below are high-fiber food options for diverticulosis and low-fiber food options for diverticulitis.
Once your recovery is further along, you can start to work more fat into your diet. Avocados are a standout choice. “Avocados contain healthy fats, which promote overall health,” Ehsani says. These fats support heart health and can even help your body absorb vitamins from other foods.
The diverticulitis flare will usually go away after four to six weeks, Doerfler says. At that point, you can start eating higher-fiber foods like whole grains, fruits and vegetables, and healthy fats like nuts, seeds, avocado, and olive oil.
Good options include canned fruits such as peaches or pears, applesauce, ripe bananas, and soft, ripe cantaloupe and honeydew. “It's not a lot of fiber because you're not eating the skin. The skins are the source of insoluble fiber, which can irritate inflamed polyps.”
Diet for Diverticulosis
High-fiber foods include: Beans and legumes. Bran, whole wheat bread and whole grain cereals such as oatmeal.
It's also OK to eat small fruits with seeds, such as strawberries and blueberries. Research has found that these foods are not associated with an increased diverticulitis risk.
Eggs contain protein that can be easily digested, and it will not irritate your digestive tract. Therefore, scrambled eggs can be taken during diverticulitis.
You may have heard advice that people with diverticular disease should avoid small, sharp and hard foods such as nuts, seeds and corn. The thinking is that there is a risk of undigested remnants of these foods lodging in the diverticula and causing inflammation.
When stress is added to the overall picture, the problem of diverticulitis becomes an issue. This is due to the body impulses that will immediately address stressful situations by shifting the oxygen and blood from the digestive tract to the brain and muscles.
If your diet is currently low in fibre then it is advisable to increase fibre gradually; aim to introduce 1-2 new high fibre foods per week. It is recommended that adults aim for 30g of fibre a day. Foods High in Fibre: Weetabix®, Bran flakes, All Bran, Fruit & Fibre, porridge, muesli, Shredded Wheat.